| 摘要 |
PROBLEM TO BE SOLVED: To display information about users authenticated by a device in the past in such a manner that an administrator of the device can easily recognize the users.SOLUTION: An image forming device 10 captures a face image of a user by a second imaging unit 18. The image forming device 10 performs face authentication by using a prestored face image and the captured face image. When the user is authenticated, the image forming device 10 stores date and time of the authentication and the user ID in association with each other, as log data. When the image forming device 10 receives a display instruction of face images of users authenticated in the past, the image forming device 10 determines image files of face images corresponding to user IDs included in log data of authentication processing, and displays face images indicated by the determined image files on a display unit 14. |
